@m.f On your first question - go though this thread for details and troubleshooting options. On your second question - your main Deco M5 can replace your existing Archer C80 as it supports the same...

@Alan08 The latest EU FW release for D7 v1 can be downloaded from here.

@Geffers That won't be possible once the rule is configured, you can only modify, disable/enable or delete an existing rule. Using these available actions you'll have to re-arrange the rule list in...

@Geffers In this user guide you can find more details about Firewall configuring - Chapter 4.15. It's actually a form of an Access Control which can be used for example in website blocking but with...

@TLenat Check this post for the manual time setting changed after device has been rebooted.

@IceBear My understanding is that they would be still compliant on a demanding markets outside EU, but selling both types on the stricter regulations EU market.